Polyimides end-capping/crosslinking

Nexam supplies thermal/heat activated crosslinking chemicals (containing alkynyl/ethynyl groups) to the polyimides industry under the NEXIMID brand and can deliver from kg to multi-ton volumes.

Nexam’s strategy to build the world-wide usage of NEXIMID products into polyimides, is to supply the market with a most competitive value proposition (not previously seen in the industry), as well as developing a range of entirely new products to meet customer needs.

Nexam supplies a full range of end-cappers/crosslinkers for usage in polyimides, with curing temperatures from 70-440 degrees C:

NEXIMID 100 (PEPA): 4-PEPA, 4-(Phenylethynyl)phthalic anhydride, CAS 119389-05-8.
NEXIMID 200 (EPA): 4-EPA, 4-(Ethynyl)phthalic anhydride, CAS 73819-76-8.
NEXIMID 300 (PETA): PETA, Phenylethynyl trimellitic anhydride, CAS not dermined yet.
NEXIMID 400 (EBPA): Ethynylbisphthalic anhydride, CAS 129808-00-0.
NEXIMID 500 (MEPA): 4-Methylethynyl)phthalic anhydride, CAS 1240685-26-0.

NEXIMID products are of very high quality (>99.0% purity).

NEXIMID products create extremely strong crosslinks.

Polyimide end-material properties that can be improved:
- Reduced water uptake and improved chemical resistance
- Lower Coefficient of Thermal Expansion (CTE) values
- Improved heat resistance
- Increased Tg
- Improved dimensional stability
- Improved wear and toughness properties
- Improved electrical properties

Polyimide processing impact when using NEXIMID products:
- Unaffected or improved processability
- Heat activated crosslinking: stable/easy to control processing
- No by-products

NEXIMID products can be used in polyimides for:
- Structural parts
- Films
- Adhesives
- Coatings and varnishes
- Friction materials
- Industrial equipment/applications

This means that Nexam’s products will, for example, enable polyimides to further replace metal in high-temperature applications, improve the heat resistance and dimensional stability of films for the electronics industry etc.

If you are a polyimides producer or user of materials, please contact us with your specific requests.

For specifications and purchasing please contact us at: sales(a)nexam.se
For technical and product development enquiries please contact us at: info(a)nexam.se